FLINT, Mich. (AP)  Classes have been canceled for the day at Kettering University in Michigan after racist graffiti was found at a residence hall.

The Flint Journal reports that letters sent to staff, faculty and students note at least two recent cases of racist and profane graffiti at Thompson Hall on the school”s Flint campus.

The school canceled classes Tuesday as school and law enforcement officials investigate. The school says the graffiti reported Thursday and Sunday was immediately removed.

WEYI-TV reports the graffiti targeted black students.

The school”s president, Robert McMahan, says he”s “deeply upset by these incidents, for the pain this has caused the students to whom these messages were directed, and for the hurt this has caused to our entire campus community.”